How can you make a movie about sick teenagers without the most skeptical audience accusing you of being overly optimistic? The people behind Sunny dancer choose to give the lead role to a character who is also skeptical, and angry, and understandably resentful. So the audience will discover a summer camp for young people with cancer through Ivy (Bella Ramsey), a teenager who has overcome leukemia and who did not want to go there at all. In the best of cases, the audience will accompany Ivy along a certain journey from emotionally blocked cynicism to a certain reconciliation with her own emotions and with the beauties and pains of the world.